Start Submission Become a Reviewer

Reading: Chaotic and regular trajectories in the Antarctic Circumpolar Current

Download

A- A+
Alt. Display

Original Research Papers

Chaotic and regular trajectories in the Antarctic Circumpolar Current

Authors:

Jonas Nycander ,

Meteorologiska institutionen Stockholms universiteit, S-106 91 Stockholm; Defence Research Establishment, S-172 90 Stockholm, SE
X close

Kristofer Döös,

Meteorologiska institutionen Stockholms universiteit, S-106 91 Stockholm, SE
X close

Andrew C. Coward

Southampton Oceanography Centre, Southampton SO14 3ZH, GB
X close

Abstract

Methods from chaos theory are applied to the analysis of the circulation in the Southern Ocean, using velocity fields produced by a realistic global ocean model. We plot the intersections of individual trajectories encircling Antarctica with a vertical plane in the Drake passage. This so-called Poincare section shows a drastic difference between regular trajectories in a corereg ion of the Antarctic Circumpolar Current (ACC), and chaotic, mixing trajectories in the surrounding region. It also shows that there is a region with overturning circulation of approximately 3.5 Sv in the ACC, with downwelling on the northern side and upwelling on the southern side, which may be related to the Deacon cell.

How to Cite: Nycander, J., Döös, K. and Coward, A.C., 2002. Chaotic and regular trajectories in the Antarctic Circumpolar Current. Tellus A: Dynamic Meteorology and Oceanography, 54(1), pp.99–106. DOI: http://doi.org/10.3402/tellusa.v54i1.12118
  Published on 01 Jan 2002
 Accepted on 30 May 2001            Submitted on 11 Oct 2000

References

  1. Behringer , R. P. , Meyers , S. D. and Swinney , H. L. 1991 . Chaos and mixing in a geostrophic flow . Phys. Fluids A 3 , 1243 – 1249 .  

  2. Beloshapkin , V. V. , Chernikov , A. A. , Natenzon , M. , Ya. Petrovichev , B. A. , Zagdeev , R. Z. and Zaslavsky , G. M. 1989 . Chaotic streamlines in pre-turbulent states . Nature 337 , 133 – 137 .  

  3. Blanke , B. and Raynaud , S. 1997 . Kinematics of the Pacific Equatorial Undercurrent: a Eulerian and Lag-rangian approach from GCM results . J. Phys. Oceanogr . 27 , 1038 – 1053 .  

  4. Döös , K. 1994 . Semianalytical simulation of the meridional cells in the Southern Ocean . J. Phys. Oceanogr . 24 , 1281 – 1293 .  

  5. Döös , K. 1995 . Inter-ocean exchange of water masses. J. Geophys. Res . 100 , C7 , 13499 – 13514 .  

  6. Döös , K. and Webb , D. J. 1994 . The Deacon cell and the other meridional cells in the Southern Ocean . J. Phys. Oceanogr . 24 , 429 – 442 .  

  7. Fountain , G. O. , Khakhar , D. V. and Ottino , J. M. 1998 . Visualization of three-dimensional chaos . Science 281 , 683 – 686.  

  8. Hirst , A. C. , Jackett , D. R. and McDougall , T. J. 1996 . The meridional overturning cells of a world ocean model in neutral density coordinates . J. Phys. Oceanogr . 26 , 775 – 791 .  

  9. Hoppema , M. , Fahrbach , E. and de Baar , H. E.W. 2000 . Surface layer balance of the Southern Antarctic Circumpolar Current (prime meridian) used to derive carbon and silicate consumptions and annual air—sea exchange for CO2 and oxygen. J. Geophys. Res . 105 , C5 , 11359 – 11371 .  

  10. Lichtenberg , A. J. and Lieberman , M. A. 1983 . Regular and stochastic motion . Springer-Verlag , New York .  

  11. Pierrehumbert , R. T. 1991 . Large-scale horizontal mixing in planetary atmospheres . Phys. Fluids A 3 , 1250 – 1260 .  

  12. Polvani , L. M. and Wisdom , J. 1990 . Chaotic Lagrangian trajectories around an elliptic vortex patch embedded in a constant an uniform background shear flow . Phys. Fluids A 2 , 123 – 126 .  

  13. Webb , D. J. 1996 . An ocean model for array processor computers. Comput . Geosc i . 22 , 569 – 578 .  

  14. Webb , D. J. 2000 . Evidence for shallow zonal jets in the South Equatorial Current region of the southwest Pacific . J. Phys. Oceanogr . 30 , 706 – 720 .  

comments powered by Disqus